Mibew Emoji plugin

It replaces emojis codes with images in chat messages. The full list of supported emojis can be found at http://www.emoji-cheat-sheet.com/

Emoticons like :-) and ;D are also supported.

Installation

Get the archive with the plugin sources. At the moment the only option is to build the plugin from sources.
Untar/unzip the plugin's archive.
Put files of the plugins to the <Mibew root>/plugins folder.
(optional) Add plugins configs to "plugins" structure in "<Mibew root>/configs/config.yml". If the "plugins" stucture looks like plugins: [] it will become:
```
plugins:
    "Mibew:Emoji": # Plugin's configurations are described below
        ignore_emoticons: false
```
Navigate to "<Mibew Base URL>/operator/plugin" page and enable the plugin.

The plugin can be configured with values in "<Mibew root>/configs/config.yml" file.

Type: Boolean

Default: false

If set to true, the plugin only converts :emoji: and ignore emoticons like :-) and ;D. This value is optional and can be skipped.

There are several actions one should do before use the latest version of the plugin from the repository:

Obtain a copy of the repository using git clone, download button, or another way.
Install node.js and npm.
Install Gulp.
Install npm dependencies using npm install.
Run Gulp to build the sources using gulp default.

Finally .tar.gz and .zip archives of the ready-to-use Plugin will be available in release directory.